Basis of Presentation (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of reportable segments | segment				1
Gain on sale of business		$ 0	$ 178,200,000	$ 0	$ 178,200,000
Net sales		0	77,100,000	0	352,000,000
Net income (loss) from discontinued operations		(1,000,000)	163,700,000	(1,600,000)	174,400,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | France Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business	$ 178,200,000
Proceeds from sale of business	267,300,000		267,300,000		267,300,000
Net assets sold	82,500,000		82,500,000		82,500,000
Accelerated amortization expense of restricted stock units and stock options	1,500,000		1,500,000		1,500,000
Deal transaction costs related to sale	$ 5,100,000		5,100,000		5,100,000
Net sales		0	77,100,000	0	352,000,000
Net income (loss) from discontinued operations		0	165,100,000	0	175,100,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | SARL Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		0	0	0	0
Net income (loss) from discontinued operations		0	0	0	200,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | NATG
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		0	0	0	0
Net income (loss) from discontinued operations		$ (1,000,000)	$ 1,400,000.0	$ (1,600,000)	$ 900,000